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Security requirements for cooperative work: a model and its system implications

Published: 12 September 1994 Publication History

Abstract

Applications involving cooperation between several users are often expressed in terms of operations on shared objects. The challenge is to provide adequate access to shared objects for cooperating principals while maintaining the required level of integrity and privacy for objects. We assume an open system environment populated with distributed and potentially shareable and persistent objects. Security mechanisms should be independent of application programs, ensuring the security of data objects regardless of the programs that are used to access them. In general, we need the ability to control access at the level of each of the operations of an object.We present a security model that reflects the structure of cooperative work, enabling users' security policies and other task requirements to be translated directly into access rights for those shared objects whose protection must be guaranteed for the successful outcome of cooperative tasks. Our model is derived from a study of some cooperative tasks in the real world [5]. The model is based on notions of group tasks, organisational roles and delegation. We consider briefly the implications of our security model for operating system design in the context of a shared object system based on a distributed shared memory model [1].

References

[1]
Mossiere, J. and Rousset de Pina, X., Single address space or private address spaces?, Bull-Imag Systemes, April 1994. (Position paper to be presented at Sixth European SIGOPS Workshop).
[2]
Wobber, E., Abadi, M., Burrows, M. and Lampson, B.W., Authentication in the TAOS operating system, ACM Operating Systems Review, December 1993, pp. 256-269.
[3]
Lampson, B.W., Abadi, M., Burrows, M. and Wobber, E. Authentication in Distributed systems: Theory and Practice. ACM Trans, on Computer Systems, 10, 4, Nov. 1992, pp. 265-310.
[4]
Chase, J. S., Levy, H. M., Lazowska, E.D., Baker-Harvey, M., Lightweight shared objects in a 64-bit Operating System, Proc. OOPSLA '92, pp. 397-413, ACM Press 1992.
[5]
Coulouris, G.F. and Dollimore, J., Requirements for security in cooperative work: two case studies, Technical Report 671, Department of Computer Science, Queen Mary and Westfield College, May 1994.
[6]
Hagimont, D. Protection in the Guide object-oriented distributed system. To appear in Proceedings of ECOOP 94.

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cover image ACM Conferences
EW 6: Proceedings of the 6th workshop on ACM SIGOPS European workshop: Matching operating systems to application needs
September 1994
201 pages
ISBN:9781450373388
DOI:10.1145/504390
  • General Chair:
  • Jurgen Nehmer,
  • Program Chair:
  • Marc Shapiro
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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 12 September 1994

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EW94
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EW94: 1994 ACM SIGOPS European Workshop
September 12 - 14, 1994
Wadern, Germany

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Overall Acceptance Rate 37 of 37 submissions, 100%

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